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| author |   Ingo Molnar <mingo@elte.hu> | 2009-03-28 23:24:12 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-28 23:24:12 +0100 |
| commit | d00ab2fdd4dc4361c97777bc1fef7234329d4659 (patch) | |
| tree | b8d8f98c1af633bbc1570b4270b39727737beebf /drivers/net/sfc/falcon_io.h | |
| parent | futex: remove the pointer math from double_unlock_hb, fix (diff) | |
| parent | Merge branch 'percpu-cpumask-x86-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip (diff) | |
| download | linux-dev-d00ab2fdd4dc4361c97777bc1fef7234329d4659.tar.xz linux-dev-d00ab2fdd4dc4361c97777bc1fef7234329d4659.zip | |
Merge branch 'linus' into core/futexes
Diffstat (limited to 'drivers/net/sfc/falcon_io.h')
| -rw-r--r-- | drivers/net/sfc/falcon_io.h | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/net/sfc/falcon_io.h b/drivers/net/sfc/falcon_io.h index c16da3149fa9..8883092dae97 100644 --- a/drivers/net/sfc/falcon_io.h +++ b/drivers/net/sfc/falcon_io.h @@ -238,18 +238,21 @@ static inline void falcon_writel_page(struct efx_nic *efx, efx_dword_t *value, /* Write dword to Falcon page-mapped register with an extra lock. * * As for falcon_writel_page(), but for a register that suffers from - * SFC bug 3181. Take out a lock so the BIU collector cannot be - * confused. */ + * SFC bug 3181. If writing to page 0, take out a lock so the BIU + * collector cannot be confused. + */ static inline void falcon_writel_page_locked(struct efx_nic *efx, efx_dword_t *value, unsigned int reg, unsigned int page) { - unsigned long flags; + unsigned long flags = 0; - spin_lock_irqsave(&efx->biu_lock, flags); + if (page == 0) + spin_lock_irqsave(&efx->biu_lock, flags); falcon_writel(efx, value, FALCON_PAGED_REG(page, reg)); - spin_unlock_irqrestore(&efx->biu_lock, flags); + if (page == 0) + spin_unlock_irqrestore(&efx->biu_lock, flags); } #endif /* EFX_FALCON_IO_H */ |